Substance profile
1H-1,2,4-Triazole
1H-1,2,4-Triazole is needles from benzene/ethanol.
01 · Identification
What 1H-1,2,4-Triazole is
1H-1,2,4-Triazole is needles from benzene/ethanol. It boils at 260 °C, melts at 121 °C, is soluble in water.
Under the GHS it carries the signal word Danger.
Other names for 1H-1,2,4-Triazole
- 1,2,4-triazole
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H360FD | May damage fertility. May damage the unborn child. |
| H302 | Harmful if swallowed. |
| H319 | Causes serious eye irritation. |
Precautionary statements: P264, P270, P280, P301, P305, P312, P313, P330, P337, P338
03 · Physical and chemical properties
1H-1,2,4-Triazole properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 260 °C (500 °F) | ICSC | |
| 260 °C (500 °F) | decomposes, decomposes | HSDB | |
| Melting point | 120.5 °C (248.9 °F) | range, midpoint shown | ICSC |
| Density | 0.64 g/cm³ | ICSC | |
| Solubility | Soluble in water, ethanol | HSDB | |
| Solubility in water, g/100ml at 20 °C: 125 | at 20 °C | ICSC | |
| Vapor pressure | 0.0015 mmHg | at 20 °C | ICSC |
| 0.6 mmHg | Haz-Map | ||
| Flash point | 170 °C (338 °F) | HSDB | |
| Autoignition temperature | 490 °C (914 °F) | HSDB | |
| Lower explosive limit (LEL) | Finely dispersed particles form explosive mixtures in air. | HSDB | |
| May explode on heating. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling 1H-1,2,4-Triazole
Storage conditions
Keep container tightly closed in a dry and well-ventilated place.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Reacts with strong acids and strong oxidants.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check 1H-1,2,4-Triazole in the storage compatibility matrix →